Event ID 13 Source CertificateServicesClient-CertEnroll

I am getting this event error on a Windows 2008 R2 server 

Log Name:      Application
Source:        Microsoft-Windows-CertificateServicesClient-CertEnroll
Date:          25/11/2013 5:06:54 AM
Event ID:      13
Task Category: None
Level:         Error
Keywords:      Classic
User:          SYSTEM
Computer:      CN-FS01.cn.local
Description:
Certificate enrollment for Local system failed to enroll for a DomainController certificate with request ID N/A from CN-FS01.cn.local\cn-CN-FS01-CA (Class not registered 0x80040154 (-2147221164)).
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-CertificateServicesClient-CertEnroll" Guid="{54164045-7C50-4905-963F-E5BC1EEF0CCA}" EventSourceName="CertEnroll" />
    <EventID Qualifiers="49754">13</EventID>
    <Version>0</Version>
    <Level>2</Level>
    <Task>0</Task>
    <Opcode>0</Opcode>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2013-11-24T19:06:54.000000000Z" />
    <EventRecordID>52741</EventRecordID>
    <Correlation />
    <Execution ProcessID="0" ThreadID="0" />
    <Channel>Application</Channel>
    <Computer>CN-FS01.cn.local</Computer>
    <Security UserID="S-1-5-18" />
  </System>
  <EventData>
    <Data Name="Context">Local system</Data>
    <Data Name="TemplateName">DomainController</Data>
    <Data Name="RequestId">CN-FS01.cn.local\cn-CN-FS01-CA</Data>
    <Data Name="CA">N/A</Data>
    <Data Name="ErrorCode">Class not registered 0x80040154 (-2147221164)</Data>
  </EventData>
</Event>

I have had a look around google and techNet but still am unable to find the fix to the exact issue.

Checked the cert "cn-CN-FS01-CA"  and does not expire till 2016.